Window balance

A home owner from California, USA says:
September 12, 2022
My Window balance is 1/2" x 22" stamped with 2140 B.S.I...Not sure if I need 390 or 351 series. I'm leaning towards 390 but not sure what side I measure shoe.
Thumbnail of the uploaded file named 20220912_094145.jpg
Thumbnail of the uploaded file named 20220912_091058.jpg
Thumbnail of the uploaded file named 20220912_091105.jpg
Thumbnail of the uploaded file named 20220912_091046.jpg
Profile picture of Casey
Casey from SWISCO responded:
September 14, 2022

Hello,

As long as the top fitting of your balance does not have wings, I agree that you could have either our S351-22, with a 15-002 bottom attachment, or S390-22, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You'll also need a 2140 spring strength option for your replacement balances. Thank you!

Comparison of the S351 and S390 balance shoes.
Comparison of the S351 and S390 balance shoes.
22" Series 351 Channel Balance
22" Series 351 Channel Balance
S351-22
$9.91
22" Series 390 Channel Balance
22" Series 390 Channel Balance
S390-22
$9.59
How to Identify Replacement Channel Balances
How to Identify Replacement Channel Balances
VIDEO
WATCH >
How to Replace a Non-Tilt Channel Balance
How to Replace a Non-Tilt Channel Balance
VIDEO
WATCH >
How to Repair a Jammed Window
How to Repair a Jammed Window
VIDEO
WATCH >
How to replace a non-tilt channel balance
How to replace a non-tilt channel balance
GUIDE
READ >
Choosing a Non-tilt Channel Balance: What Will We Need?
Choosing a Non-tilt Channel Balance: What Will We Need?
GUIDE
READ >
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 3-4 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.